Here's what looks like a bug in the S10 BIOS: after installing extra RAM into my new S10, I was initially unable to get BIOS to accept the memory amount, so I got POST error 164 each time I rebooted. My fix was to clear CMOS (by moving a system board jumper, power cycling, and then setting it back), and the memory mismatch error was fixed.
But this process also cleared my BIOS passwords, so I decided to set them up again. While I can set a USER password, every time I try to set a SETUP (ADMIN) password, I now get another POST error on rebooting.
It seems that if I have a SETUP password, BIOS cannot get through the POST without reporting an error if something has changed since last time - in this case, this is simply THE PASSWORD ITSELF!
If I clear the SETUP password, POST works fine. I now wonder if this same thing was the reason my S10 did not automatically accept the additional RAM, despite my going into SETUP to "approve it"?
So to my suspected bug: On the S10 (model 6423), it seems that setting a SETUP/ADMIN BIOS password causes certain settings changes (including memory upgrades and even the password itself!) to fail to register properly, resulting in POST errors.
Has anyone else experienced problems like this? How can/should I report this to Lenovo?
Brian